Demogar,
I don't know if you already bought your WD Green Drive or not but, if you have not, and have the intention to use it in a Raid setup, you should know that WD specifically recommends these "Green" drive not be used in a Raid array. I think Dlink also has something to say on the subject adn might not support these drives. Before you purchase. google "WD TLER PROBLEMS". I frankly don't understand it completely, but check it out first if you can.
PS. I am running 2 2TB Samsung drives without problems. I got them from an "Egg" place. Good luck.